Pitfall: The Lost Expedition Codes -

Hyper punch mode:
Hold + and press , , , , , , at the title screen. You will see a message if you have entered the code correctly.

Bottomless canteen mode:
Hold + and press , , , , , , , at the title screen. You will see a message if you have entered the code correctly. Your canteen will now have an unlimited amount.

Unlock Nicole:
Hold L + R and press , , , , , (x2) at the title screen. You will see a message if you have entered the code correctly.

Classic Pitfall mini-game:
Hold + and press (x2), , , , , , , at the title screen. You will see a message if you have entered the code correctly. The "Original Pitfall" option will be unlocked at the "New Game/Load Game" screen.

Classic Pitfall 2: Lost Caverns mini-game:
Hold + and press , , , , (x3) at the title screen. You will see a message if you have entered the code correctly. The "Lost Caverns" option will be unlocked at the "New Game/Load Game" screen. Alternately, buy all items from the Shamans and collect all Idols.